滚动视图
滚动视图有两种:
1.ScrollView,它是垂直方向的滚动视图;垂直方向滚动时,layout_width属性值设置为match_parent,layout_height属性值设置为wrap_content。
例如:
(1)XML文件中:
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<HorizontalScrollView
android:layout_width="wrap_content"
android:layout_height="200dp">
<!-- 水平方向的线性布局,两个子视图的颜色分别为青色和黄色 -->
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
<View
android:layout_width="300dp"
android:layout_height="match_parent"
android:background="#aaffff" />
<View
android:layout_width="300dp"
android:layout_height="match_parent"
android:background="#ffff00"/>
</LinearLayout>
</HorizontalScrollView>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content">
<!-- 垂直方向的线性布局,两个子视图的颜色分别为绿色和橙色 -->
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical">
<View
android:layout_width="match_parent"
android:layout_height="400dp"
android:background="#00ff00"/>
<View
android:layout_width="match_parent"
android:layout_height="400dp"
android:background="#ffffaa"/>
</LinearLayout>
</ScrollView>
</LinearLayout>
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(2)Java代码:
java
package com.example.chapter01;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class ScrollLayoutActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scroll_layout);
}
}
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2.HorizontalScrollView,它是水平方向的滚动视图;水平方向滚动时,layout_width属性值设置为wrap_content,layout_height属性值设置为match_parent
例如:
(1)XML文件中:
XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<HorizontalScrollView
android:layout_width="wrap_content"
android:layout_height="200dp">
<!-- 水平方向的线性布局,两个子视图的颜色分别为青色和黄色 -->
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
<View
android:layout_width="300dp"
android:layout_height="match_parent"
android:background="#aaffff" />
<View
android:layout_width="300dp"
android:layout_height="match_parent"
android:background="#ffff00"/>
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>

(2)Java代码:
java
package com.example.chapter01;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class ScrollLayoutActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scroll_layout);
}
}
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